Presonus ADL 700 Tube-Driven Channel Strip  From Presonus

A single-channel version of the award-winning ADL 600 Class A tube preamplifier with a full-featured FET compressor/limiter, and a 4-band semi-parametric EQ.  

Presonus

PreSonus ADL 700 Tube-Driven Channel Strip Overview

SoundPure Recording Engineer, Allen Palmer, reviews the PreSonus ADL 700 Tube-Driven Channel strip and it's excellent features that make it a must have channel strip and hardware processor for any home or pro studio. The ADL 700 incorporates a single-channel version of the award-winning PreSonus ADL 600 two-channel tube preamplifier, which was codesigned with famed tube-circuit designer Anthony DeMaria. PreSonus and DeMaria teamed up to create a distinctive Class A, discrete design that employs one 12AT7 and two 6922 vacuum tubes per channel, operating with ±300V power rails for maximum headroom and superb tone. The dual-transformer design ensures low-noise operation, with maximum common-mode rejection. This results in an ultra-low-noise tube preamp with a big, warm, smooth, clear, and distinctive sound. With its extensive feature set, ultra-low noise, extended frequency response of 10 Hz to 45 kHz, and top-of-the-line sound, the ADL 700 is a superb creative tool for serious recording engineers and musicians. Want to hear the ADL 700 in your studio with your gear? Give us a call to set up a 5 day no risk demo period to hear exactly why any serious recording engineer should own at least one ADL 700, if not a pair! 919-682-5552 Thanks for watching!

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    • Presonus ADL 700 Tube-Driven Channel Strip

Manufacturer's Description from Presonus

PreSonus is proud to announce the ADL 700 channel strip, which combines a high-end, Class A tube preamplifier with a fully variable, FET-based compressor and a four-band semi-parametric equalizer. The new channel strip provides separate balanced XLR mic, balanced XLR line, and ¼” TS instrument inputs and a single balanced XLR output.
 

The Preamp

The ADL 700 incorporates a single-channel version of the award-winning PreSonus ADL 600 two-channel tube preamplifier, which was codesigned with famed tube-circuit designer Anthony DeMaria. PreSonus and DeMaria teamed up to create a distinctive Class A, discrete design that employs one 12AT7 and two 6922 vacuum tubes per channel, operating with ±300V power rails for maximum headroom and superb tone. The dual-transformer design ensures low-noise operation, with maximum common-mode rejection. This results in an ultra-low-noise tube preamp with a big, warm, smooth, clear, distinctive sound.
 
Among the hallmark features of ADL-series preamps is an Input Source Select switch with variable mic-input impedance. This switch enables you to choose among signal sources and patches the selected input through the signal chain, completely bypassing the other two inputs. It also provides a choice of four mic-input impedances: 1500Ω, 900Ω, 300Ω, and 150Ω. Lowering or raising the ADL 700 mic-input impedance can create subtle coloring and filtering effects, enabling you to get a wider variety of tonalities without using the EQ. 
 
Of course, the preamp offers 48V phantom power, polarity reverse, and a -20 dB pad. In addition, it provides variable mic-input gain, employing an 8-position rotary switch that provides 35 dB of gain in 5 dB increments. A Trim potentiometer (±30 dB) allows you to make fine adjustments to the final preamp stage of the ADL 700 input. You also get a -12 dB/octave high-pass filter whose frequency threshold can be set at 20 Hz, 40 Hz, 80 Hz, or 200 Hz, or it can be turned off completely.
 

The Compressor

The ADL 700’s FET-based compressor and semi-parametric EQ were custom-designed by Robert Creel, the mastermind behind many of PreSonus’ most beloved analog circuits, including the XMAX™ preamp. FET (Field-Effect Transistor) compressors use transistors to emulate a triode-tube sound. This type of compressor generally provides a faster attack time and better repeatability than the optical compressors that are more commonly found in channel strips in this price class. 
 
The ADL 700 compressor features include fully variable attack, release, threshold, ratio, makeup gain, and bypass. When Threshold is turned fully counterclockwise to the ST position, the onboard compressor controls are bypassed, and compression is controlled externally via a Stereo Link connection to a second ADL 700.
 

The EQ

The 4-band semi-parametric EQ was designed with musicality in mind, combining isolated filters and optimized, per-band Q to provide subtler signal shaping without harsh artifacts. All bands have Gain (±16 dB) and Frequency controls, with overlapping frequency ranges and fixed Q (0.6). The low and high bands are switchable between shelving and peak.
Dual-mode analog VU metering enables monitoring of output and gain-reduction levels. A -6 dB switch offsets the meter for use with hot source signals. A master level control adjusts the overall output from -80 to +6 dB. 
 

The Jist

With its extensive feature set, ultra-low noise (-100 dB S/N ratio), >73 dB gain, extended frequency response of 10 Hz to 45 kHz, and top-of-the-line sound, the ADL 700 is a superb creative tool for serious recording engineers and musicians. 
Presonus

About Manufacturer

PreSonus Corporation, a developer of audio technologies for the professional and semi-professional digital audio markets, was founded in 1995 and presently has an active distribution network in place that reaches over 20 million audio consumers. PreSonus also manages a high traffic website, www.presonus.com that is experiencing over 100,000 hits per month. The Company has released 18 professional audio products that have shipped to over 41 countries. Presonus has received the Electronic Musician Magazine Editor's Choice Award for four different products. The Company's products have also been nominated several times for MIX Magazine's Technical Excellence in Creativity Awards (TEC). In all, over 150,000 PreSonus products are in use around the world. The Company's primary objective is to leverage its research and development ability, intellectual property portfolio, expertise in manufacturing, well respected brand, and established distribution channels to continue swift growth in revenue and profitability. PreSonus has exhibited consistent growth of an average of 48.6% per year over the past six years and predicts continued double digit growth rates for the next three years. PreSonus was founded on the precept of research and development in new technologies and discovery and exploitation of emerging multi-media markets. The Company has passed the 'proof of concept' stage and is presently utilizing its proprietary designs and patents to expand product offerings. PreSonus has extensive relationships in the music, technology, Internet, manufacturing and consumer electronics industries as well as a highly respected professional audio brand - PreSonus Audio Electronics. Competencies necessary to promote and support digital audio technology include qualified personnel in research, engineering, manufacturing, music and marketing as well as direct experience with branding and business development. PreSonus has developed a talented staff and exceptional reputation and is poised to take advantage of the burgeoning digital audio and digital media consumer markets.

Specifications

  • High-voltage, all-tube, Class A, dual-transformer design with one 12AT7 and two 6922 vacuum tubes

  • Fully variable FET compressor with attack, release, threshold, ratio, makeup gain, and stereo link

  • Four-band, semi-parametric EQ

  • Variable high-pass filter

  • Selectable microphone input impedance

  • Switched Gain and variable Fine Trim controls

  • Microphone, instrument, and line inputs with Source Select

  • Ultra-low noise (-100 dB S/N ratio) and high gain (>73 dB gain)

  • 48V phantom power, polarity invert, and -20 dB pad

  • Dual-mode analog VU metering (output and gain reduction)

  • 2U rack-mount

Sound Clips